Climate averages 1991–2020

Sihanoukville weather
in January.

A hot, fairly dry month: the joint 5th warmest and the 2nd driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 29.4°C Daytime mean, January

Average low 24.1°C Night-time mean, January

Rainfall 37 mm 10 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

January is a hot month in Sihanoukville: daytime highs average 29.4°C and nights cool to about 24.1°C. By daytime temperature it is the joint 5th warmest of the 12 months.

Expect about 37 mm of rain on roughly 10 days, which makes January a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 35 min on an average January day.

The nearest other city in this atlas is Phú Quốc (64 km away). In January its highs average 26.8°C, 2.6°C cooler than Sihanoukville, with 34 mm of rain.

Among the 8 cities listed in Cambodia, Sihanoukville ranks 8th of 8 for the warmest January highs and 8th of 8 for the driest January (rainfall, lowest first). The mean January high of those 8 cities is 31.3°C; Sihanoukville is 1.9°C cooler than that mean.

From January to February, average highs rise by 0.5°C to 29.9°C, and monthly rainfall falls from 37 mm to 30 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Sihanoukville climate table

1991–2020

Monthly climate averages for Sihanoukville, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	29.4°C24.1°C	24.1°C	37	9.7	11.612 h
February	29.9°C24.5°C	24.5°C	30	8.3	11.812 h
March	30.6°C25.5°C	25.5°C	65	13.4	12.112 h
April	30.9°C26.2°C	26.2°C	115	19.0	12.412 h
May	29.8°C26.1°C	26.1°C	377	27.9	12.613 h
June	28.8°C25.7°C	25.7°C	489	27.7	12.713 h
July	28.3°C25.3°C	25.3°C	558	29.4	12.713 h
August	28.1°C25.3°C	25.3°C	556	28.9	12.512 h
September	28.0°C25.0°C	25.0°C	554	28.4	12.212 h
October	28.5°C24.7°C	24.7°C	343	27.1	11.912 h
November	29.3°C24.9°C	24.9°C	104	15.4	11.612 h
December	29.4°C24.5°C	24.5°C	44	9.3	11.512 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

January in nearby cities

Distance from Sihanoukville

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sihanoukville) is explained once on the Sihanoukville year overview and on the Sources, method and limits page.